Incandescent device



(No Model.)

0. A. VON WELSBAOH.

INGANDESOENT DEVIGE.

No. 399,174. Patented Mar. 5, 1889.

Z7f9666i jzareieloz fig M azrZafaer V022, II kZacZ,

61 a j/Azw. MY

5 pire of and usetul incandescci'it l)evices,(lor wluch j I have obtained patents in France, dated 1 UNITED STATES PATENT EEicE.

YARL AUER VON \VELSBACH, OF VIENNA, AUSTBIA-HUNGARY, ASSIGNOR TO THE VVEITS ZACH INCANDESCENT GAS LIGHT COMPANY, OF NEIV JERSEY.

lNCANDESCENT DEVICE.

SPECIFICATION forming part of Letters Patent No. 399,174, dated March 5, 1889.

Application filed March 8,

1887. Serial No. 230,146. (No model.) Patented in France November '1, 1885, N 172,064; in Bel gium November 4;, 1885, 110.70,?39 in England llovemher 4, 1835,1111. 18,8 12, December 12,1885,No.15,286,a11(1 March 13,

1886, No. 3,592; in Italy February 23, 1886, XXXVIII, 310:

in Cape of Good Hope March 1,1886, No. 6/205 in Victoria March17,188fi, 110.4,472; in Tasmania March 2 1, 1886, No. 898 /9; in 80111311 Australia May 3,1886, No 678; in New South Wales May 11, 1886,1113. 1,829/2 in New Zcaland June 11,1886,

No.1,863; in Queensland June 28, 1886,1111. 106 i in Pinland July 10, 1886,1Tm261; in Spain August 10, 1886, No. 9,081/5,858; in Norway August 25, 1886, No. 88, and in India September 2, 1886,1Im40 1,146.

To a-ZZ whom it may concern:

Be it known that I, CARL AUER \oN WELS- BACH, a subject of the Emperor of Austria- Hnngary, residing; at Vienna, in the vEin- Austriallungary, have invcniiml new November 1, 1885, No. 172,061; Belg-i um, dated Xorember 1, 1.885, No. 70,739; Italy, dated February 33, 1881 Vol. XXXYIII, No. 310; France, Certificate 01 Addition, dated April 22, 1886, No. 172,061; Belgium, Certificate of Addition, dated September 9,1886,No. 71,502; Spain, dated August 10, 1886, No. 9,031/5,858; Italy, Certificate of Addition, (lat-ed October 13, 1886, Vol. XL, No. 415; Finland, dated July 10, 1886, No. 261; Norway, dated August 25, 1886, No. 88; Victoria, dated March 17, 1886, No. 4,172; New South ales, dated May 11, 1886, No. 1,829/2; Tasmania, dated March 24,1886, No. 398/ 9; Queensland, dated June 28, 1886, No. 106; New Zealand, dated June 11, 188 3, No. 1,863; (ape of Good llope, datedv March 1, 1886, No. 6/205; India, dated September-2,1886,No.lO/hllo; South Australia, dated May 3, 1886, No. 678; Great Britain, dated November 1, 1885, No. 13,312, and December 12, 1885,.No. 15,286,:1nd arch 13, 1886, No. 8,592,) of which the following is a specification.

This invention has for its object to provide a novel solution for impregnating a fabric, thread, or other combustible material to man ufacture incandescentdevices according to the method set forth in my application filed June 8, 1886, Serial No. 20l,558. In my said application I described a method of making an incandescent device by im 'iregnating a combustible fabric or thread with aqueous or other solutions of the metallic salts of the rarer metals which produce earthy oxides, and f subsequently consuming the con'ibustible material, leaving a skeleton hood or frame comosed of the earthy oxides resulting from the {decomposition of the metallic salts of the n'ietals, which, when rendered incamlescont,

gives onla brilliant and intense light.

The atmompanying' drawing illustrates a frame.

I have discovered lhai an excellent effect is produced bya solution of the salto'f thorinum alone 0112182111 ingredient for impregnating the combustible Iain-iv or lln-end,as in the following examples:

First. A solution of the salt of lliorinum produces a hood or frame which is rigid when rendered incandescent.

Second. A solution composed of the salts of thorinum, about three parts, with two parts of magnesia, makes a hood or frame which is flexible when rendered incandescent Third. A solution of the salts of thorinum, zirconium, and yttrium in nearly equal proportions imparts a slightly yellow tint. to the light-.-

Fourth. A solution composed of the salts of thorinum, zirconium, and lanthanum in nearly equal proportions-the lanthanum a little in exccssgives a very brilliant light, and the hood is flexible when rendered incandescent.

Fifth. A solution composed of one part 01' the salts of thorinum and one part of lanthanum, with about half part of magnesia,.makes a hood or frame which is flexible when rendered incandescent.

Sixth. A solution of the salts of thorinum, about three parts,with one of alumina, gives a hood or frame which is very flexible when rendered incandescent.

In the solutions which include the salt of lanthanum for a portion of that substance the salt of yttrium may be substituted.

' Nhen a yellow light is desired, the solu- 1 (ions may be, seventh, a solution of the salts of thorin um and lanthanum in equal propou tions.

side elevation of one form ol such hood or For an orange light, it may be, eighth, a solution of the salts of thorinum and neodymium in equal proportions.

For a greenish light it may be, ninth, a solution of the salts of thorinum and erbium in equal proportions.

I11 the mixtures 7, S, and 9 the salt of zirconium may be substituted for a portion of the salt of thorinum. Though magnesia and alumina can be employed, as in 5 and 6, it is better to avoid the use of much of these sub- 2 l i l pregnated therewith, and then the impregnated fabric or thread is subsequently exposed to the heat of a flame, whereby the fabric or thread is consumed, leaving a skeleton hood or frame composed of the product of the decomposed salt or salts, which is thori num oxide alone or in connection with the other ingredients mentioned.

HaX'ing thus described my invention, what I claim is- 1. An incandescent composed of the oxide of thorinum, substantially as described.

2. A filament, fabric, or textile frame of combustible material impregnated with a salt of thorin um in aqueous solution, substantially set forth.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 2th day of May, A. D. 1886.

CARL AUER VON \VELSBAOH.

Vitness es:

VICTOR TISCHLER,

EDMUND .T USSEN. 

